Cardo poly(arylene ether sulfone) block copolymers with pendant imidazolium side chains as novel anion exchange membranes for direct methanol alkaline fuel cell

Anil H.N. Rao, Hyoung Juhn Kim, Sukwoo Nam, Tae Hyun Kim

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

A series of phenolphthalein-based cardo poly(arylene ether sulfone) (PES) block copolymers containing pendant imidazolium group (PI-PESs) were synthesized as novel anion exchange membranes for direct methanol alkaline fuel cells. These PI-PESs combine the advantages of pendant anion conductors on the polymer side chains with the thermochemical stabilities of the imidazolium group, showing high hydroxide conductivity, together with good physical and chemical stability under basic conditions. The hydroxide conductivity over 0.03 S/cm at 20 C and 0.1 S/cm at 80 C was obtained for the PI-PES membranes. In addition, PI-PES membranes show low permeability to methanol (below 6.74 × 10 -8 cm2/s) and very high selectivity (over 3.7 × 105 S·s/cm3). These properties make the PI-PESs promising candidate materials for anion exchange membranes for direct methanol alkaline fuel cells.

Original languageEnglish
Pages (from-to)6918-6928
Number of pages11
JournalPolymer
Volume54
Issue number26
DOIs
Publication statusPublished - 2013 Dec 13

Keywords

  • Anion exchange membrane
  • Direct methanol alkaline fuel cell
  • Pendant imidazolium-functionalized polymer

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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